US9044550B2 - Needle cover with site preparation tip - Google Patents
Needle cover with site preparation tip Download PDFInfo
- Publication number
- US9044550B2 US9044550B2 US12/307,099 US30709907A US9044550B2 US 9044550 B2 US9044550 B2 US 9044550B2 US 30709907 A US30709907 A US 30709907A US 9044550 B2 US9044550 B2 US 9044550B2
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- US
- United States
- Prior art keywords
- needle
- tip
- scab
- needle cover
- set according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3653—Interfaces between patient blood circulation and extra-corporal blood circuit
- A61M1/3655—Arterio-venous shunts or fistulae
Definitions
- Hemodialysis is a common treatment for kidney failure, especially when a kidney transplant cannot be performed.
- a patient's blood is removed (a small amount at a time) and circulated through a hemodialysis machine to remove impurities and regulate fluid and chemical balances.
- the purified blood is then returned to the patient.
- Blood can be removed from the patient through an access point to the patient's bloodstream. This access point is usually in the patient's arm, and allows blood to be removed and returned quickly, efficiently, and safely during hemodialysis or other procedures requiring frequent access to the patient's bloodstream.
- the area within which an access point may be established may be formed by constructing an arteriovenous fistula (AV fistula), which is the surgical connection of an artery to a vein.
- AV fistulas are commonly used to form areas for access points because once formed, they can be used for years, and are less likely than other methods to produce clots or become infected.
- AV fistula arteriovenous fistula
- the connection between the artery and the vein increases blood flow through the vein, causing the vein to enlarge and strengthen. This change allows a greater amount of blood to pass through the vein, thereby increasing the efficiency of the hemodialysis, and also facilitates repeated insertions into the vein.
- a “ladder” methodology is used in which the access point for needle insertion in the AV fistula is gradually and systematically moved up the entire length of the AV fistula to prevent any one area from being weakened by excessive needle sticks in a short period of time.
- An alternative approach is the constant site cannulation method in which the same needle insertion site is used for repeated hemodialysis treatment sessions.
- a sharp needle is used at an aseptic site to puncture the skin and vessel.
- a mature needle insertion site will form with a “tunnel” or “track” of scar tissue.
- the same needle insertion angle and depth of penetration is generally employed, usually by the same clinician.
- subsequent site cannulations may be performed using a blunt needle. Prior to performing constant site cannulation with a blunt needle, the cannulation site must be prepared.
- aseptic techniques are utilized to cleanse the cannulation site (e.g. by washing the site with soap and water or an antimicrobial agent, preferably using circular movements).
- the scab from the previous cannulation must be removed. (It should be understood that after the previous hemodialysis treatment session is completed and the needles are removed, a scab, or crust, will form at the entrance of the site).
- the blunt needle is removed from its sterile packaging and its cover removed.
- the blunt needle is then advanced along the established scar tissue tunnel track using a consistent angle and depth of insertion. This technique has been shown to generally reduce the cutting of tissue surrounding the established scar tissue tunnel or track.
- Other potential advantages of the constant-site cannulation technique using blunt needles include reduced pain, hematoma, infections, thrombosis, infiltrations, and missed needle sticks.
- an aseptic needle cover including a site preparation tip at a distal end of the needle cover for removing scabs or other material prior to cannulation without posing a sharp object injury threat.
- the needle cover includes a body that is generally hollow or tubular and may be essentially cylindrically shaped.
- the site preparation tip may be formed as a scoop integrally formed at the distal end of the needle cover body and shaped as a partial cutaway beveled portion of an extended hollow cylindrical portion of the needle cover body, forming a trough and a rounded tip for lifting a scab as it separates from the patient's skin.
- site preparation tips may be employed, including but not limited, to a slightly fork-like embodiment to retain the scab and lift the scab from either side as the scab removal tip is advanced along the scab, a tip with substantially straight edges to reduce the chance that the tip will slip to one side of the scab as the scab removal tip is advanced along the scab, a curved tip to press down on the skin adjacent to the scab and ensure that the removal tip reaches under material such as a scab prior to removal of the scab, or a tip configured with opposing members that flex toward one another (e.g., like a tweezer) to help grasp and remove the scab.
- a slightly fork-like embodiment to retain the scab and lift the scab from either side as the scab removal tip is advanced along the scab
- a tip with substantially straight edges to reduce the chance that the tip will slip to one side of the scab as the scab removal tip is advanced along the scab
- the proximal (open) end of the needle cover body may include a circumferential ring or flange integrally formed with the needle cover body and/or a plurality of raised sections integrally formed with the needle cover body to provide stops and gripping surfaces on the outside of the needle cover.
- the circumferential ring may also serve the purpose of providing a larger opening for receiving the needle holder (hub), luer or luer lock of a needle assembly.
- Air vent grooves may also be formed in the inner surfaces of the circumferential ring and the needle cover body to enable air to escape from or enter into the interior of the needle cover body and provide for easier insertion or removal of the needle assembly from the needle cover body.
- the circumferential ring also exposes a step surface on the interior of the needle cover body that acts as a stop to prevent the needle and its corresponding hub, luer or luer lock from extending too far into the interior of the needle cover body.
- any of the site preparation tips may include an anti-slip finger restraint which may be formed as one or more raised circumferential sections located towards the proximal end of the needle cover body to reduce the chance of finger slippage and contamination of the cannulation site and/or site preparation tip at the distal end as the needle cover body is grasped.
- the tweezer-like embodiment may further or alternatively include a finger guard on each opposing member to prevent finger slippage and contamination of the cannulation site and/or the opposing members at the distal end as they are grasped.
- a needle cover in one embodiment, includes a hollow needle cover body including an open proximal end for receiving a needle and a closed distal end, and a tip including a beveled edge extending from the closed distal end.
- a needle set includes a needle assembly, and a needle cover removably coupled to the needle assembly, the needle cover including a hollow needle cover body having a closed distal end and an open proximal end, and a site preparation tip including a rounded distal edge extending from the closed distal end of the needle cover body.
- a method for removing material from a cannulation site includes removing material from a cannulation site prior to cannulation utilizing a site preparation tip provided on a needle cover.
- a coupled needle assembly and needle cover are removed from a sterile pack after a cannulation site has been cleansed and immediately prior to use.
- the needle cover body is grasped and manipulated onto the scab/crust covering the cannulation site, the tip of the needle cover being utilized to scrape and remove the scab/crust.
- scab removal may be effectuated by gently depressing the skin adjacent to the scab with the tip of the needle cover and then advancing the tip of the needle cover toward the scab until it is lifted and separated from the surrounding skin.
- the cannulation site is once again cleansed following removal of the scab/crust.
- the needle assembly is then separated from the needle cover and the needle is inserted into the cannulation/access site.
- FIG. 1A is a perspective view of one embodiment of a needle cover with a scoop design.
- FIG. 1B is a side view of the distal end of the needle cover of FIG. 1A .
- FIG. 1C is a perspective view of the proximal end of the needle cover of FIG. 1A .
- FIG. 1D is a perspective close-up view of the proximal end of the needle cover of FIG. 1A .
- FIG. 2A is a perspective close-up view of the distal end of another embodiment of a needle cover.
- FIG. 2B is a perspective close-up view of the distal end of another embodiment of a needle cover.
- FIG. 2C is a perspective close-up view of the distal end of another embodiment of a needle cover.
- FIG. 2D is a perspective close-up view of the distal end of another embodiment of a needle cover.
- Embodiments of the present invention relate generally to an aseptic needle cover shaped for removing scabs or other material at the needle insertion site prior to insertion of the needle, without posing a sharp object injury threat.
- the needle cover as described herein, may be used for a number of different applications, such as, but not limited to, covering blunt needles and removing scabs/crust prior to constant site cannulation for hemodialysis treatment sessions, and for covering other types of needles and removing scabs or other types of material prior to insertion of the needles for other types of treatments.
- the needle cover and corresponding needle assembly together comprise a needle set.
- FIG. 1A shows one embodiment of a needle cover with a site preparation tip.
- Needle cover 10 includes a scoop-shaped material removal tip 102 for removing scabs or other material prior to cannulation, and a body 100 that is generally hollow or tubular and may be essentially cylindrically shaped as shown in FIG. 1A , but which may also be gradually tapering or have square, rectangular, triangular, oval or other cross-sectional shapes.
- the needle cover body 100 may be formed from a material such as, but not limited to, polyurethane, polyethylene, polypropylene, and the like.
- a needle assembly (not shown) is insertable into, or removable from, an open proximal end 104 of the hollow needle cover body 100 along a longitudinal axis of the needle cover.
- the proximal end 104 of the needle cover body 100 may include a circumferential ring or flange 106 integrally formed with the needle cover with a larger radius than the needle cover.
- the flange 106 may provide a retaining surface to assist a person or machine in inserting the needle cover body 100 over a needle assembly, and may also provide a larger opening in the needle cover to receive the needle.
- the needle cover body 100 may also include a plurality of raised sections 108 integrally formed with the needle cover body and oriented parallel to the longitudinal axis of the needle cover body 100 . In an alternative embodiment, the raised sections may also be formed as a plurality of circumferential rings around the needle cover body 100 .
- the raised sections 108 may be located at the proximal end 104 of the needle cover body 100 to provide a gripping surface located away from the tip 102 , so that a sterile environment for the tip 102 is maintained.
- the tip 102 may be integrally formed at a distal end of the needle cover body 100 , or separately formed and affixed to the distal end of the needle cover body.
- the tip 102 may be shaped as a partial cutaway beveled portion of an extended hollow cylindrical portion of the needle cover body 100 , forming a trough or valley 112 , although in alternative embodiments the tip 102 may be shaped as a partial cutaway portion of an extended solid cylindrical portion of the needle cover body 100 , in which case no trough or valley 112 would exist (e.g., the tip would include a planar upper surface).
- the tip 102 extends from the closed end 110 of the needle cover body 100 a length L and forms a rounded distal edge 114 , including a radius R, and includes a distal surface 113 and beveled surfaces 116 , including a width W, to facilitate the lifting of material from a patient's skin.
- the beveled surfaces 116 having approximately equivalent widths W in the embodiment of FIGS. 1A-1B , extend from the closed end 110 of the body 100 to the distal surface 113 , the beveled surfaces 116 and distal surface 113 together framing the trough or valley 112 . As shown in profile in FIG.
- the beveled edges of the tip 102 are generally non-planar, including a convex portion 117 followed by a concave portion 118 .
- the beveled edges of the tip 100 are generally planar (e.g., FIG. 2B ), while in still other embodiments, the tip 102 includes beveled edges without a distal surface 113 and/or without surfaces 116 .
- a base surface 103 of the tip 102 is substantially the same as a corresponding surface of the distal end of the body (i.e., semi-circular in cross-section) from which it extends.
- the tip 102 extends from the distal end of the needle cover body 100 a length L in the range of approximately 4 mm to approximately 8 mm, preferably approximately 6 mm, has a radius R of the rounded distal tip in the range of approximately 1.0 mm to approximately 2.0 mm, preferably approximately 1.5 mm, and has a width W of the beveled surfaces in the range of approximately 0.5 mm to approximately 1.5 mm, preferably approximately 1 mm.
- FIG. 1C is a perspective view of the open proximal end 104 of the exemplary needle cover body 100 for receiving a needle or other instrument.
- the cylindrical circumferential ring 106 integrally formed at the proximal end 104 of the needle cover body 100 provides a larger opening for receiving or removing a needle.
- Air vent grooves 107 may be formed in the inner surfaces of the circumferential ring 106 and the needle cover body 100 to enable air to escape from or enter into the interior of the needle cover body and provide for easier insertion or removal of the needle from the needle cover 10 .
- FIG. 1C is a perspective view of the open proximal end 104 of the exemplary needle cover body 100 for receiving a needle or other instrument.
- the cylindrical circumferential ring 106 integrally formed at the proximal end 104 of the needle cover body 100 provides a larger opening for receiving or removing a needle.
- Air vent grooves 107 may be formed in the inner surfaces of the circumferential ring 106 and the needle cover body 100
- FIG. 1D is a perspective close-up view of the open proximal end 104 of the exemplary needle cover body 100 , illustrating the feature of a step surface 109 that acts as a stop to prevent a needle and its corresponding hub, luer or luer lock from extending too far into the interior of the needle cover body.
- the step surface 109 is generally a planar surface perpendicular to the longitudinal axis of the needle cover body 100 .
- Inner surfaces 111 of the circumferential ring 106 and the needle cover body 100 may be designed and shaped to receive and secure a hub, luer or luer lock or other portion of the needle assembly.
- FIG. 2A is a perspective close-up view of the distal end of a needle cover 20 with a needle cover body 100 and a site preparation tip 120 .
- the tip 120 has a fork-like shape, which in this embodiment has dual extended portions 122 that have a curved shape, which are separated by a recessed portion 124 .
- the extended portions 122 may be less curved (i.e., more pointed) and/or may number more than two (i.e., three or more extended portions).
- the extended portions 122 act to retain a scab or other material and lift the scab from either side as the scab removal tip is advanced along the scab.
- FIG. 2B is a perspective close-up view of a needle cover 30 with a site preparation tip 130 and an anti-slip finger restraint 132 .
- the scab removal tip 130 of FIG. 2B is beveled with a flat front edge 134 to reduce the chance that the tip 130 will slip to one side of the scab as the site preparation tip 130 is advanced along the scab.
- the sides of the tip 130 are also substantially straight so that the tip 130 includes a perimeter with substantially straight edges.
- the anti-slip finger restraint 132 shown in FIG. 2B as a continuous raised circumferential section reduces the chance of finger slippage and contamination of the site preparation tip 130 as the needle cover body 100 is grasped at the plurality of raised sections 108 .
- the restraint 132 is shown as a circumferential section in FIG. 2B , in other embodiments, the restraint 132 may be any raised section on the needle cover body 100 that provides a barrier to prevent one or more fingers from sliding distally along an outer surface of the needle cover body 100 .
- FIG. 2C is a perspective close-up view of a needle cover 40 with site preparation tip 140 .
- the site preparation tip 140 is formed in a curved shape with a distal end slightly less pointed (i.e, with a larger radius) than tip 102 of FIG. 1A .
- FIG. 2D is a side close-up view of a needle cover 50 with site preparation tip 150 and optional finger guard 152 .
- the site preparation tip 150 of FIG. 2D is formed as tweezers to help grasp the scab prior to its removal. Plastic or other material of a thickness to provide suitable flexibility and elasticity may be used to form the opposing members 154 , 156 of the tip 150 .
- FIGS. 2A-D are exemplary only, and that other site preparation tip designs fall within the scope of the present invention.
- the needle cover as described herein provides an aseptic method of removing scabs from hemodialysis or other access sites without requiring the use of additional devices and does not pose a sharp injury threat (e.g., as would be present in the standard practice of utilizing a separate needle to remove the scab).
- the needle assembly and needle cover 10 coupled together as a needle set are removed from a sterile pack after a cannulation/access site has been cleansed and immediately prior to use.
- the needle cover body 100 is grasped with the needle assembly remaining therein, the needle cover tip 102 being positioned first over the cannulation site and then onto the cannulation site covering material (e.g., scab, crust, etc.), the tip 102 being manipulated to scrape or otherwise remove the scab/crust from the cannulation site.
- the cannulation site covering material e.g., scab, crust, etc.
- removal of the cannulation site covering material may be accomplished by gently depressing the skin adjacent to the covering material with the tip 102 of the needle cover and then advancing the tip 102 toward the covering material until it is lifted and separated from the surrounding skin and cannulation site.
- the cannulation site is once again cleansed following removal of the scab/crust.
- the needle assembly is then separated from the needle cover 10 by grasping in the other hand (e.g. the left hand if the right hand is holding the needle cover 10 ) and pulling apart.
- the needle of the needle assembly is then inserted into the cannulation/access site without delay.
- the added scab removal functionality of the needle cover eliminates the need for other instruments such as tweezers or hypodermic needles, eliminates the inconvenience and dangers associated with their use (including needle stick), and eliminates the time and cost of sterilizing such additional instruments, if sterilization is performed. If aseptic methods are not normally performed with separate scab removal instruments, embodiments of the present invention further reduce the risk of infection by eliminating the use of non-sterile instruments. In addition, if these additional scab removal instruments are of the single-use type, embodiments of the present invention eliminate the cost of the instruments themselves.
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Surgical Instruments (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/307,099 US9044550B2 (en) | 2006-07-05 | 2007-07-02 | Needle cover with site preparation tip |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81860606P | 2006-07-05 | 2006-07-05 | |
PCT/US2007/015369 WO2008005441A2 (en) | 2006-07-05 | 2007-07-02 | Needle cover with site preparation tip |
US12/307,099 US9044550B2 (en) | 2006-07-05 | 2007-07-02 | Needle cover with site preparation tip |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090270882A1 US20090270882A1 (en) | 2009-10-29 |
US9044550B2 true US9044550B2 (en) | 2015-06-02 |
Family
ID=38895188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/307,099 Active 2029-02-01 US9044550B2 (en) | 2006-07-05 | 2007-07-02 | Needle cover with site preparation tip |
Country Status (6)
Country | Link |
---|---|
US (1) | US9044550B2 (ja) |
EP (1) | EP2035062A4 (ja) |
JP (1) | JP5189090B2 (ja) |
AU (1) | AU2007269631B2 (ja) |
CA (1) | CA2656090C (ja) |
WO (1) | WO2008005441A2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9044550B2 (en) | 2006-07-05 | 2015-06-02 | Jms North America Corporation | Needle cover with site preparation tip |
US8506536B2 (en) | 2009-02-20 | 2013-08-13 | Nxstage Medical, Inc. | Medical devices and methods for assisting in sub-scab access |
WO2011159802A1 (en) | 2010-06-15 | 2011-12-22 | Caymus Medical, Inc. | Systems and methods for creating arteriovenous (av) fistulas |
JP5916237B2 (ja) | 2010-06-15 | 2016-05-11 | アベヌ メディカル インコーポレイテッドAvenu Medical,Inc. | 血管内の動脈と静脈の吻合及び組織溶着カテーテル |
WO2013090309A1 (en) * | 2011-12-12 | 2013-06-20 | Mcallister Devin V | Vented needle |
JP5890173B2 (ja) * | 2011-12-27 | 2016-03-22 | 川澄化学工業株式会社 | 瘡蓋剥離ユニット及び医療用具 |
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- 2007-07-02 EP EP07810145A patent/EP2035062A4/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
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JP5189090B2 (ja) | 2013-04-24 |
WO2008005441A2 (en) | 2008-01-10 |
CA2656090C (en) | 2015-11-24 |
AU2007269631B2 (en) | 2012-12-20 |
EP2035062A4 (en) | 2013-01-16 |
US20090270882A1 (en) | 2009-10-29 |
JP2009542343A (ja) | 2009-12-03 |
EP2035062A2 (en) | 2009-03-18 |
WO2008005441A3 (en) | 2008-08-21 |
AU2007269631A1 (en) | 2008-01-10 |
CA2656090A1 (en) | 2008-01-10 |
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